DE102005022328A1 - Transport crate for fresh fish is assembled from injection molded plastic components - Google Patents

Abstract

A heat insulated transport crate container is fabricated of plastic foam in an injection molding process in which the sidewalls and base are individually made. The process is initiated by withdrawal of the piston to extract any foam from the form, followed by injection of the new molten plastic charge.

Description

The The invention relates to a thermally insulated transport box made of plastic, which consists of a floor and four side walls made of a foamed plastic are manufactured, and a method for its preparation.

Insulated transport boxes are used where perishable chilled goods one or more transhipped and / or relocated before they can come to the consumer. This is e.g. in the fishing industry the case where the trapped fish initially stored in trawler cold storage will be loaded onto trucks after landing on the auction hall comes and is exhibited there, and then transported on, to the fish factory, a cold store or often a long way to the fishmonger and then to the consumer to be transported.

Insulated transport boxes are nowadays mostly made of styrofoam. They are prone to shock and therefore only for one single transport route, because they are after repeated reloading so damaged are that their reuse on other transport routes often to complete Breakage and thereby increased work and spoilage of Goods leads. The return transport such used polystyrene boxes for reuse is highest unprofitable, because a big one Volume for one very low weight needed becomes. The disposal of used Styrofoam boxes is increasingly causing problems.

Transport boxes without thermal insulation there is a huge one Diversity, including those for the Empty transport are collapsible to make room for their storage. Such collapsible boxes would be with insulating walls Naturally Especially in the fish and meat industry asked, because the empty boxes then did not need up in the cold rooms to be stored for their use.

The Invention avoids the disadvantages of the prior art. It is the object of the invention, a frequently reusable thermo-insulated To provide a box with easy-to-clean walls, for the Empty transport is collapsible and easily recovered from the collapsed Condition for a renewed transport is set up.

Of the Box of the invention is characterized in that the bottom and the four side walls individually from one in the injection molding machine already by retraction the piston pre-foaming plastic and then Advance the piston for filling the injection mold are made, wherein the walls of the box forming parts the shape or parts of these after filling the foaming Plastic in the injection mold under volume enlargement of the Interior are pulled apart, making box parts with smooth outsides and foam in the interior arise that the ground and the four side walls are connected by joints with each other, whose location is in places is located where no volume increase in the injection mold takes place when pulling the moldings and that the side walls by slide on two opposite lying side walls, those in openings the other side walls intervene, are interlocked with each other.

This Transport box has walls and / or a floor on, the areas of different density of the plastic to have. By filling of the prefoamed Plastic in the manufacturing form is in itself a uniform filling of the interior achieved the manufacturing form, which in itself a uniform density expect the produced molding. In fact, though, that is Density of the plastic directly on the mold wall denser than in the middle of the molded product, because here the plastic cool already and solidifies while he still foams in the middle of the molding and can flow while doing so. In this state, the production form under volume increase of Interior pulled apart by a certain distance, causing the still foaming plastic in the middle of the molding enlarged foam bubbles can form. In this way, the density is on the outside the largest, in its middle smallest. That gives the shape, in this case the box wall or the box bottom, on the outside increased stability and thus an increased freedom from damage.

According to the invention, this box is made by making the bottom and the four side walls individually from a pre-foaming in the injection molding machine by retracting the piston plastic and then advancing the piston to fill the injection mold, after which the mold parts after filling the foaming plastic in the injection mold under volume enlargement of its interior pulls apart, thereby forming box parts with smooth outer sides and foam in the interior, that one connects the bottom and the four side walls by joints with each other, whose location is in places where no increase in volume in the injection mold when pulling the Moldings or parts of these takes place and that the side walls by slide on two opposite side walls, which engage in openings of the other side walls, locked together.

On this way, a box of high fatigue resistance is created, but light Weight that can be used many times, easy to clean is and easy for to combine the empty transport, but for the transport easily and can be quickly rebuilt.

This Method is designed so that the production on just one machine, The injection molding machine can be done in a simple manner, although on every workpiece Zones or areas of different density and capacity are located. So is the plastic on the outside of the produced workpieces denser than inside the workpieces, in the area of the joints even denser and thus more durable and unbreakable.

Advantageous It may be that you have the mold wall for making the walls and The bottom of the box is made of several parts, the different far from the mold wall pulled out to produce different wall Stronger are in different wall areas.

The Essence of the invention is described below with reference to a perspective View showing drawing schematically illustrated embodiment explained in more detail.

The box consists of a floor 1 and two longitudinal side walls 2 and two end walls 3 , These sidewalls 2 . 3 are over joints 4 connected to the ground. The floor is in the area of the longitudinal side walls 2 around a paragraph 5 pulled higher than in the area of the front walls 3 so that when folding the box first, the front side walls 3 can be repositioned and then ground parallel on the ground 1 lie and then the longitudinal side walls 2 can be transferred, which then lie on the ground-parallel front side walls.

The floor 1 and the side walls 2 . 3 are smooth on the outside and thus easy to clean, but inside they are made of foamed material, which was produced by injecting prefoamed material into the injection mold, which was then further expanded by pulling the walls of the production mold immediately after completion of the mold filling operation. The shape can be multipart and the parts of the mold can be pulled apart at different distances. So can eg

that the handle 6 forming molding part to be firm and not at all mobile, while the molding surfaces 7 continue to be pulled out of the form than the wall parts 8th around the handle 6 around between the molding surfaces 7 , As a result, areas of different thickness and different density are produced in each manufactured side wall.

1

ground

2

Longitudinal side wall

3

End wall

4

joint

5

paragraph

6

handle

7

forming surface

8th

wall part

Claims (5)

Thermo-insulated transport box made of plastic, consisting of a bottom and four side walls, which are made of a foamed plastic, characterized in that the bottom and the four side walls individually from a pre-foaming in the injection molding machine by retracting the piston plastic and then advancing the piston to Filling the injection mold are made, wherein the walls of the box forming parts of the manufacturing form or parts thereof are pulled apart after filling of the foaming plastic in the injection mold with increase in volume of the interior, whereby box parts with smooth outer sides and foam arise in the interior that the bottom and the four side walls are interconnected by joints whose position is in locations where there is no increase in volume in the injection mold when the moldings are being pulled apart, and in that the side walls are pushed r on two opposite side walls which engage in openings of the other side walls are locked together. Thermally insulated transport box according to claim 1 characterized in that at least one side wall and / or the floor has at least one area of different wall thickness. Thermoislierter transport box according to claim 2, characterized in that the areas of different wall thickness having sidewall and / or the bottom of impressions of the wall of the box forming multi-part manufacturing mold, such parts, the different far out of the mold wall ausschiebbar to produce different wall thicknesses in different wall areas. Process for the preparation of a thermoisolated Plastic transport box, consisting of a floor and four side walls, the from a foamed Plastic are made, characterized, that One the floor and the four side walls individually from one in the Injection molding machine already by retracting the piston pre-foaming plastic and then Advance the piston for filling the injection mold produced, after which you have the parts of the manufacturing mold wall or Parts of this after filling of the foaming Plastic in the injection mold under volume magnification of the interior pulls apart, whereby box parts with smooth outsides and indoor foam, that one the ground and the four side walls connected by joints whose position is in places, where no increase in volume in the Injection mold takes place when pulling the moldings and that you have the side walls by slide on two opposite lying side walls, those in openings the other side walls intervene, locked together. Method according to claim 4, characterized in that that in the production of the box, a mold wall for the production the walls and / or the bottom of the box used, made of several parts is that different far out of the mold wall extractable to produce different wall thickness are in different wall areas.